Improvement in air hand-engines



c.`w. RILEY.

Air Hand-Engine.

Paten'td June 29,1875. 4 y

.vaaraiie WiTN ESSES y' ATTORNEYS THE GRAPHIC CO.PHUTO-L!TH.39&41 PARK PLACEJLY1 PATENT OFFICE.. n

OHAR'LESW. RILEY, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN AIRHAND-ENGINES.

Specification forming part of Letters Patent No. 165,027, dated J une 29, 1875; application led March 27, 1875.

To all whom it may concern Beit known that I, CHARLES W. RILEY, of Philadelphia,l in the county of Philadelphia and State of Pennsylvania., have invented a new and valuable Improvement in Air Hand- Engines; 1 and do hereby declare that the following is a full, clear, and exact .description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specifica-tion, and to the letters and figures ot' reference marked thereon. g

Figures 1 and 2 of the drawings are representations of vertical central sections of my machine, and Fig. 3, 4, 5, and 6, are detail views:

rEhis invention has relation to engines which are driven by compressed air and held in the hand-when used, and which are designed for dentists, wood-carvers, wood-engravers, and others and the nature of my invention consists in the combination of a rotating toolholder, rotating valves, a piston, and induction and eduction air-passages, with a case which serves as a convenient handle, as will be understood from the following description.

In the annexed drawing, A designates a cylinder, in which is applied a spindle, B, the ends of which have their bearings in the ends of the cylinder A. The reduced and exposed end of the spindle B has a socket in it for the attachment of a drill or other instrument, and the opposite end of the spindle has a socket in it to receive the flattened end of a valve-stem, C. The spindle B has two oblique grooves, b b, in it, which communicate with each other at their extremities. In

the grooves b I) plays a feather, c, which is formed on a reciprocating yoke, d, to which two piston-rods, e c, are secured. The pistonrods pass through the end f of cylinder A, and are secured to a piston, l), which works in a case, E, screwed on the end f of cylinder A. A circular recess is made in the center of the end f, in which recess rotates a cylindrical valve, g, which is fast on one end of the stem C. The stem C passes freely through the center of the piston D, and has fixed on its opposite end a valve, g', similar in construction to the valve g. In the end f of the cylinder A are two ports, i t', which are diametrically opposite each other, and which establish communication, at proper times, between the interior ofthe case E on one side'of the piston D, and two air-passages, la h. 'lwo ports, fn n, establish Vcommunication between the interior of the case E on the opposite side of the piston D and the passages li h.

Air under pressure is taken from a suitable reservoir by means of a flexible pipe, p, and conducted into the engine through the passage h, which leads through a passage, z', and valve g, into the c'ase E, on one side ofthe piston. When the piston has made the stroke represented in Figs. l and 2 of the drawing, valve g closes its inlet-port t' and opens its exhaustport At the same time valve g opens its inlet-port n and closes its exhaust-port. The piston now makes another stroke. These rectilinear movements ofthe piston D communicate a rotary movement to the spindle by reason of feather c traversing the oblique grooves b b, which rotary` movement is imparted to the two valves g g. Valves g g are cylinders, having recesses in their ends, and slotsV through their sides, as shown in Fig. 6, so that the air in entering and leaving the interior of the case E will pass through these valves.

What I claim as new, and desire to secure by Letters Patent, is

In a hand air-engine, the rotary tool-spindle B, having oblique grooves b b, in combination with the yoke d, having a feather, c, and connected with the piston D, valves g g, `and induction and 4edu'ction ports, substantially as described.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

CHARLES W. RILEY.

Witnesses: i

. ALLEN H. GANGEWER,

E. FARBEN. 

